Rank: 77 based on 486 downloads (last 30 days) and 30 files submitted
photo

Divakar Roy

E-mail
Company/University
Georgia Institute of Technology
Lat/Long
33.77727127075195, -84.3985595703125

Personal Profile:

Masters Graduate in Electrical & Computer Enginering with specialization in Image and Video Processing and Related DSP Stuffs and Computer Engineering.
* Lately focussing on Code Optimization*.

Professional Interests:
Image Processing, Video Processing, MATLAB, Code Optimization

 

Watch this Author's files

 

Files Posted by Divakar View all
  • 1 - 5 of
  • 30
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
27 Jun 2011 Screenshot TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy ascii, show, text, image, convert, fun 72 6
  • 4.5
4.5 | 4 ratings
24 Jun 2011 URL2LOCATION Locates the country corresponding to the URL Author: Divakar Roy url, website, internet protocol, location, country, find 3 0
24 Jun 2011 IP2LOCATION Locate IP server Author: Divakar Roy internet protocol, location, country, find, ip, server 1 0
24 Jun 2011 Screenshot Check Whether a Point Lies Inside,Outside or On a Circle Checks whether a point lies inside,outside or on a circle defined by 3 other points. Author: Divakar Roy circle, inside, approximation, lie, interpolation, outside 21 2
24 Jul 2010 Screenshot HIDE TEXT FILES INTO IMAGE Hides text files(.txt and .m) into bitmap image Author: Divakar Roy hide, files, image, steganography, hidden, encryption 80 11
  • 4.66667
4.7 | 3 ratings
Comments and Ratings by Divakar View all
  • 1 - 5 of
  • 14
Updated File Comments Rating
31 Oct 2011 AUTO CONTRAST Automatic adjustment of contrast of images Author: Divakar Roy

Nurul,

If input_img and output_img are the input and output filenames, this is how you run it:
>> autocontrast(input_img,output_img);

Thanks!
27 Jun 2011 TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy

Hello,

First of all thank you for going through the code and putting up all those feedback.

I saw few files on MATLAB File-exchange and outside of it that convert images into ASCII text files. They gave those images fun-look.
The main intention when I made this code was to take a snapshot of those text files, so that one could see the whole text file without scrolling.

For more info please google for "text to image".

About using ASCII char set, yes that was one option, but then I am not using all the characters from the ASCII set, I am only using 95 ASCII characters, so even if I try to replace strfind, in the revised code I would have to still use
some sort of index finding method.

I followed your suggestion to do pre-allocation for att2, which gave me appreciable speed-up, so a big thank you to you! Pre-allocation won't be easy in the earlier part because of the variable nature of the sizes.

Thanks again!
Divakar
11 Apr 2011 Hide Images In Image Embedding Utility Author: Divakar Roy

It's not exactly LSB-algorithm, it basically uses 8 pixels from source to form the 8bit of the embedded image. Idea was to minimize the change in the source, so that there is negligible change in it.
14 Jan 2011 HIDE TEXT FILES INTO IMAGE Hides text files(.txt and .m) into bitmap image Author: Divakar Roy

Hello Priyabrata, are you using MATLAB 7.x? This project was made on MATLAB 6.5 and haven't been updated to work on new versions. It's mentioned in the description.

- Divakar
22 Jul 2010 Hide Images In Image Embedding Utility Author: Divakar Roy

Yes you can insert as many images as you want, as long as you are not using more than 100 percentage of the source image(see the screenshot). It was clearly said in the description.
Comments and Ratings on Divakar's Files View all
  • 1 - 5 of
  • 97
Updated File Comment by Comments Rating
19 Jan 2012 Hide Images In Image Embedding Utility Author: Divakar Roy khan, sabir

please give me some idea about how i hide an image into another image using matlab, please send me details code for encoding and decoding, i will be very gladful.
                    thanking you,
31 Oct 2011 AUTO CONTRAST Automatic adjustment of contrast of images Author: Divakar Roy Roy, Divakar

Nurul,

If input_img and output_img are the input and output filenames, this is how you run it:
>> autocontrast(input_img,output_img);

Thanks!
31 Oct 2011 AUTO CONTRAST Automatic adjustment of contrast of images Author: Divakar Roy hazwani, nurul

hi,
how to run this coding?
05 Jul 2011 TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy Natalya

Thanks!!!
27 Jun 2011 TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy Roy, Divakar

Hello,

First of all thank you for going through the code and putting up all those feedback.

I saw few files on MATLAB File-exchange and outside of it that convert images into ASCII text files. They gave those images fun-look.
The main intention when I made this code was to take a snapshot of those text files, so that one could see the whole text file without scrolling.

For more info please google for "text to image".

About using ASCII char set, yes that was one option, but then I am not using all the characters from the ASCII set, I am only using 95 ASCII characters, so even if I try to replace strfind, in the revised code I would have to still use
some sort of index finding method.

I followed your suggestion to do pre-allocation for att2, which gave me appreciable speed-up, so a big thank you to you! Pre-allocation won't be easy in the earlier part because of the variable nature of the sizes.

Thanks again!
Divakar
Top Tags Applied by Divakar
  • 1 - 5 of
  • 123
image, enhancement, color, convert, adjust
Files Tagged by Divakar View all
  • 1 - 5 of
  • 30
Updated   File Tags Downloads
(last 30 days) 		Comments Rating
27 Jun 2011 Screenshot TEXT2IMAGE : Convert an ASCII text file to image Text to image conversion. Author: Divakar Roy ascii, show, text, image, convert, fun 72 6
  • 4.5
4.5 | 4 ratings
24 Jun 2011 URL2LOCATION Locates the country corresponding to the URL Author: Divakar Roy url, website, internet protocol, location, country, find 3 0
24 Jun 2011 IP2LOCATION Locate IP server Author: Divakar Roy internet protocol, location, country, find, ip, server 1 0
24 Jun 2011 Screenshot Check Whether a Point Lies Inside,Outside or On a Circle Checks whether a point lies inside,outside or on a circle defined by 3 other points. Author: Divakar Roy circle, inside, approximation, lie, interpolation, outside 21 2
24 Jul 2010 Screenshot HIDE TEXT FILES INTO IMAGE Hides text files(.txt and .m) into bitmap image Author: Divakar Roy hide, files, image, steganography, hidden, encryption 80 11
  • 4.66667
4.7 | 3 ratings

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